短程硝化—厌氧氨氧化组合工艺在脱氮领域的研究进展

基于全程硝化反硝化的传统生物脱氮工艺在硝化过程中需要大量氧气供应,反硝化过程需要有机物作为碳源,存在能耗与药耗过大的问题.为了降低废水脱氮的成本,短程硝化(PN)—厌氧氨氧化(ANAMMOX)组合工艺(PNA工艺)得到了高速发展.综述了PNA工艺的影响因素,重点介绍了4种基于PN与ANAMMOX原理开发的衍生PNA工艺...

Research progress of partial nitrification-anaerobic ammonia oxidation combination process in the field of de-nitrification

The traditional biological denitrification process based on the nitrification and denitrification requires a large amount of oxygen supply in the nitrification process,and a large quantity of organic matter as a carbon source in denitrification process,which has the problem of excessive energy consumption and chemical consumption.In order to reduce the cost of wastewater denitrification,partial nitrification(PN)-anaerobic ammonium oxidation(ANAMMOX)combination process(PNA process)has been developed rapidly.The influencing factors of PNA process were reviewed,and the latest research and application status of four PNA-derived processes based on the principles of PN and ANAMMOX were introduced,including Sharon-ANAMMOX,oxygen-limited autotrophic nitrification-denitrification(OLAND),completely autotrophic nitrogen removal over nitrite(CANON)and the deammonification(DEMON)process.Finally,the differences and characteristics of the four processes were briefly compared,and the future research direction of PNA process was prospected.